Add test virsh net-uuid v3

Now I made a new pull request with net_uuid branch. And add some commits message.

Li Yang (2):
  libvirt: Add test module for virsh net-uuid
  virt: add new_from_net_dumpxml() and get_uuid_by_name() for virsh
    net-uuid

 libvirt/tests/cfg/virsh_net_uuid.cfg |   28 ++++++++++++++++++++
 libvirt/tests/virsh_net_uuid.py      |   47 ++++++++++++++++++++++++++++++++++
 virttest/libvirt_xml/network_xml.py  |   26 ++++++++++++++++++
 3 files changed, 101 insertions(+), 0 deletions(-)
 create mode 100644 libvirt/tests/cfg/virsh_net_uuid.cfg
 create mode 100644 libvirt/tests/virsh_net_uuid.py